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Phase diagram of diblock copolymer confined in a cylindrical nanopore with polymer-grafted surface

Li Ming Zhu Yue-Jin

Phase diagram of diblock copolymer confined in a cylindrical nanopore with polymer-grafted surface

Li Ming, Zhu Yue-Jin
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  • Abstract views:  3349
  • PDF Downloads:  885
  • Cited By: 0
Publishing process
  • Received Date:  18 December 2007
  • Accepted Date:  29 July 2008
  • Published Online:  05 June 2008

Phase diagram of diblock copolymer confined in a cylindrical nanopore with polymer-grafted surface

  • 1. 

Abstract: Using self-consistent field calculation, the new equilibrium morphology of a diblock copolymer melt confined in a brush_covered cylindrical nanopore can be found. The morphology is formed as a function of brush density and A-monomer fraction f. When f=0.7, due to the wetting effect produced by polymer brush the outside concentric lamellar ring will come up again with increasing φAB. We carefully examined the intermediate phases and discovered a rich variety of new two_dimensional structures that have no analogue in the unconfined system, which include nonhexagonally coordinated cylinder phases and structures intermediate between lamellae and cylinders, like CRCR, when f=0.35. Then we map the stability regions and phase boundaries for all the structures we found.

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